Add .onAttach function

[nathaneastwood]

So the user doesn't have to call the hooks themselves, I could just "attach" them straight away, i.e. run them when the user calls library(knitrhooks) (see this example).

[dr-harper]

Alternatively you could make your own R Markdown format and add the hooks within this. This gives a good example: https://stackoverflow.com/a/39961605/7347699

[nathaneastwood]

That’s really neat! But I guess it depends on where this package ends up going. It could end up catering to different formats (pdf, html, etc.) in which not all hooks will be relevant.

I guess my thoughts behind .onAttach was to load each of the hook functions so the user doesn’t have to, but then that could potentially bloat their environment unnecessarily. So both methods have negatives.